基于宽带阵列的数字信道化接收机设计与实现

Practice of channelized digital receiver design based on wide-band array

数字化宽带接收机提高了接收信号的频域覆盖带宽,但往往灵敏度降低而难以检测弱小信号。既追求足够宽的频谱带宽,又提高强杂波背景中弱小目标检测能力,是本文研究的出发点。本文基于宽带相控阵接收机的工程实践,讨论了基于频域抽取的信道化接收机设计原理,设计了一个400M瞬时带宽阵列接收机的工程样机,并成功应用于某多波束阵列接收系统。实验结果表明,该信道化宽带接收机实现了超远程对雷达脉冲信号的检测,具有一定的工程借鉴价值和理论指导意义。

Digital wideband receiver improves the receiving signal frequency coverage bandwidth,but often reduced sensitivity to detecting weak signal.The pursuit of a wide spectral bandwidth and improving the detection ability of dim and small target on strong clutter background is the starting point of this paper.Based on engineering practice of Wideband phased array receiver,this article discussed the design principle of channelized receiver which based on frequency domain sampling,and an engineering prototype of 400 MHz bandwidth instantaneous array receiver is designed and successfully applied in a multi-beam array receiving system.The experimental results show that,the channelized broadband receiver can detect the radar pulse signal of ultra-far distance;the project has a certain reference value and theoretical significance of righteousness.